Nut-lock.



P. A. HEADSON.

NUT LOCK,

APPLICATION FILED JUNE 25, 1906.

Patented Dec. 21, .1909.

mmm

b ff,

UNTTED STATES PATENT onirica.

FRANK A. HEADSON, OF LA FAYETTE, INDIANA.

NUT-LOCK.

- Application led June To all whom Iit may concern.'

Be. it known that I, FRANK A. Hnansox, a citizen of the United States, residing at La Fayette, iu the county of Tippecanoe and State of Indiana, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

i ly invention relates to nut locks; and has 'for its object to provide an improved device of this sort, and is of great simplicity of construction and use in operation.

My invention consists in the combinations and details hereinafter Set forth and claimed.

ln the accompanying drawiugs-Figure l isa-side elevation of a holt and nut with my improvements applied thereto; Fig. 2 is a transverse section ou the line of Fig. 1. Fig. 3 is a. longitiulinal section on the line 3 of Fig. 2.

In" the drawings a represents a screw threaded nut and b a screw threaded holt of the ordinary type. I provide the nut with a transverse recess fr and also with a transverse recess )f in alinement therewith, the recess F and f heilig connected by a passageway j". 'l`he recess u.: is of .such size as to intercept tlvx channel het ween adjacent threads of the nut7 thus forming a slight opening between two of the adjacent threads a', in which opening the apex of the thread on the holt is received, as indicated in Figs. 2 and 3. 'l`he portion of the apex of the thread if' on the holt. which projects into the opening hetween two adjacent threads a of thc nut is designated on Fig. 2 by the relierence character .afi \Vitl1in the recess a? I provide a locking device. shown as a ball o, which is pressed toward the inner end of the opening hy the spring d, a retaining plug e being screwed into the end of the opening, which is screw threaded for this purpose, as will be readily understood.

Specification of Letters Patent.

Patented Dec.. 21, 1909.

serial No. 323,280.

IVhen the nut is first screwed in position on the bolt, it may be turned down thereon.

to the desired extent. If however, any attempt is made to unscrew the thread on the bolt., the hall o, being forced against the thread of the bolt in a direction opposite to the direction in which the nut is turned7 will ride up over the thread and be firmly i. 'edged het ween the thread and thetop of the recess, thus preventing the turning of the nut.

ln order to provide a 1n ans for releasing the nut7 in order that it may he taken oft', I provide a screw threaded plug g having a reduced portion y which passes through the connecting passageway f between the recesses f' and ce. By turning' the screw threaded plug, the stem g will be forced against the hall c forcing it'y out of engagement of the bolt against the force of the. spring (l.

The operation of my device will he readily understood without further description.

I claim:

In a device of the class describen, a bolt, a nut thereon having a recess extending transversely through one side of it, an intermediate part of said recess heilig contracted and the recess on one side of the contracted portion intercepting the channel between adjacent threads ol the nut, a hall in the saine party of the recess, a screw plug in the end of the same recess, a coil spring between the plug and the hall, a screw plug in thtl site end ot' the recess, and a projecting through the contracted poi i the recess.

FRANK A. I-IEADSN.

W'Iitnesses NORMAN A. STREET, Vr. T. Jones. 

